Coronal T1-weighted MRI shows the extent of posterior periventricular nodular heterotopias (pPNH) (A, B, E) and a magnification of the right periventricular area (D). Coronal T2-weighted images show the bilateral pPNH (C) and a magnification of the right periventricular area (F). Note that the nodules of pPNH have the same intensity as cortical and hippocampal gray matter and are more pronounced on the right side. The arrows point to the pPNH. The hippocampus is marked with an asterisk.